read nested json object using loop

Question

I have been searching from a long time and no solutions is working for me. I have to retrieve the values from the json object using some loop , and number of nested values is random these can be 1 or may be 10. json looks like this :

{
   "keyInfo":[
      {
         "name":"ipek",
         "key":"1221"
      },
      {
         "name":"ipek",
         "key":"1221"
      }
   ],
   "terminalInfo":{
      "dateExp":"2-2-2",
      "deviceId":"1222",
      "tid":"122"
   }
}

I have tried alot of solutions one of them is this :

 JSONObject jsonObject =new JSONObject(jsonString);
 JSONObject jsonChildObject = (JSONObject)jsonObject.get("keyInfo");
 Iterator iterator  = jsonChildObject.keys();
 String key = null;
 while(iterator.hasNext()){
     key = (String)iterator.next();
     System.out.println("inval value: "
         + ((JSONObject)jsonChildObject.get(key)).get("inval"));
 }

but none of them is working for me please help. THANKS IN ADVANCE.

The json example you provided does not contain the key "files". Is the json you provided the value for the "files" key and `jsonString` is bigger than what you provided? — Andrei Tudor Diaconu, Aug 09 '15 at 14:19
it was a mistake i have edited it, it is basically not file ,it is keyInfo. — Talib, Aug 09 '15 at 14:29

score 0 · Answer 1 · answered Aug 09 '15 at 14:34

You are trying to use an array as a map. jsonChildObject is actually an JSONArray. It does not have keys; for instance you can have the same {"name":"ipek","key":"1221"} multiple times. If you know that the key is unique among items in this array, you can try and build a HashMap out of it if you need, but the structure you have is definitely an array.

read nested json object using loop

1 Answers1